'Modern' Aristo rules all have a manufacturing code on one edge of the rule. This is usually a combination of alpha
and numeric codes which defines the rule's factory of manufacture, year of manufacture and batch number. Examples of this
code are:
- 2FX16
- 4FE02
- 3LS06
- WLS32

Code Details

There are three code segments, The factory, year of manufacture and lot number. The lot number is a simple number
and requires no explanation however the codes for factory and year are here.

Factory:

Factory codes may be alpha or numeric.

Letter Code

Number Code

Factory

H

2

Hamburg

G

3

Geretsried

W

4

Wörgl

Year Code:

Up to about 1959 datea were included in the manufacturing code as a number after that the alpha codes were used.

A

R

I

S

T

O

F

L

E

X

0

1

2

3

4

5

6

7

8

9

Samples Explained

With the above codes explained then the three examples are then easily worked out to be:
- 2FX16 - Manufactured 1969 in lot 16 from the Hamburg factory
- 4FE02 - Manufactured 1968 in lot 02 from the Wörgl factory
- 3LS06 - Manufactured 1973 in lot 06 from the Geretsried factory
- WLS32 - Manufactured 1973 in lot 32 from the Wörgl factory